Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d87015d521920a4…

MALICIOUS

PDF

72.9 KB Created: 2021-03-07 08:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 295cdf1a974051009bc85b984c539230 SHA-1: a0c3845c617cc3776a3f35d2f07abb0ee83c0114 SHA-256: 0d87015d521920a4e63e810f0d4d5e4e13a62df713a10f8afb90d29109ea23ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains embedded links designed to redirect users to external websites, likely for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous disposable domains for hosting, suggesting a deliberate effort to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/strik?utm_term=what+is+the+salary+of+air+force+officer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445881/normal_60001d8672f27.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/how_long_does_it_take_for_garlic_to_be_harvested.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/nitokoribaragerazidod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486213/normal_5fcf012128276.pdfIn PDF document text
    • http://ruzoboxilotazex.22web.org/inconel_x750_sheet_stock.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_5fe92976f0fcb.pdfIn PDF document text
    • http://help-igcopyright.xyz/transformations_on_coordinate_plane_worksheet56gf0.pdfIn PDF document text
    • http://sallehq.xyz/20059027057ia9xq.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/jovet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417523/normal_5fdbd8f56724e.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/leica_m6_ttl_.58.pdfIn PDF document text
    • http://eroganoficial.site/993549221481fcba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_6dd0e6a77cc04427b94f167de0069372.pdf?index=trueIn PDF document text
    • https://dd70c91d-bff0-4db5-80ca-962f080bd6fc.filesusr.com/ugd/c34eac_c49996c79b774ee4a57ca4a5bfdfd100.pdf?index=trueIn PDF document text
    • http://megigezorozo.atwebpages.com/livros_brasileiros_para_jovens.pdfIn PDF document text
    • http://nawopezor.rf.gd/wutofifokaboj.pdfIn PDF document text
    • http://babematalal.epizy.com/kofugigovavugow.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE138 5084 bytes
SHA-256: 143c1f2476ff5a5651725ff377649b2a8852939595827afdcb1533b3db9c53a4
font_01_sfnt_off0000f292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 10648 bytes
SHA-256: 9cd363a94991bf35bc9abf4d8ab480c3dec24dfd8da9bba42b5a8418a43ca223

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